What is front-to-back ratio in an antenna?

The Front to Back Ratio (F/B Ratio) of an antenna is the ratio of power radiated in the front/main radiation lobe and the power radiated in the opposite direction (180 degrees from the main beam). This ratio tells us the extent of backward radiation and is normally expressed in dB.

What does front-to-back ratio mean in reference to a Yagi antenna?

power radiated
The “front-to-back ratio” in reference to a Yagi antenna is the power radiated in the major radiation lobe compared to the power radiated in exactly the opposite direction.

How do you increase the front-to-back ratio of an antenna?

Physical modifications to the antenna such as Shielding (on the sides and/or or back) and reflectors (in back of the antenna) can be used to increase the Front to Back Ratio by minimizing backward radiation. Reflectors are typically parabolic dishes.

What is the front-to-back ratio of an omni directional antenna?

1
The front-to-back ratio of an omni-directional antenna is 1, receiving signals from all direction with the same sensitivity. The front-to-back ratio is an important specification in directional antennas. =25dB, so that the back radiated power is minimum.

What are front end and back end ratios?

The front-end ratio measures how much of a person’s income is allocated toward mortgage expenses, including PITI. In contrast, the back-end ratio measures how much of a person’s income is allocated to all other monthly debts. It is the sum of all other debt obligations divided by the sum of the person’s income.

How is antenna efficiency calculated?

Antenna Efficiency is the ratio of power radiated (Prad) by the antenna to the power supplied (Ps) to the antenna. The efficiency of an antenna is usually measured in an anechoic chamber where an antenna is fed with some power and the strength of the radiated electromagnetic field in the surrounding space is measured.

What does omnidirectional mean?

: being in or involving all directions especially : receiving or sending radio waves equally well in all directions omnidirectional antenna.